Folding Telescopic Stool with Backrest

Abstract

Provided is a folding telescopic stool with a backrest that can provide back support to the user in the usage state without affecting the folding and storage function, can effectively improve the load-bearing capacity of the stool body, and can improve the comfort of the cushion. 【Solution means】The stool includes a base 1, and a lifting assembly including a plurality of load-bearing rings 2, 3, 4 that are mounted above the base and assembled by being nested from the outside to the inside in sequence, wherein a lifting lock structure is provided between adjacent load-bearing rings, a lifting assembly, a stool panel 5 mounted above the lifting assembly, and a backrest 6 rotatably mounted at the rear end of the stool panel. The lifting lock structure has a locked position and an unlocked position switched by the same-direction rotation along the circumferential direction of all the load-bearing rings.

Description

Technical Field

[0001] The present invention relates to the technical field of stools, and particularly to a folding telescopic stool with a backrest.

Background Art

[0002] A stool is an item often used at home or when going out. For example, when people travel, take the train, or stand in line for a long time, they always need to sit and rest. In order to reduce the occupied space, people usually carry a folding stool.

[0003] In the prior art, a general folding stool uses a telescopic structure. The stool includes a base and a stool panel located above the base. A separate load-bearing ring is provided between the base and the stool panel. The load-bearing ring has two or more layers, and two load-bearing rings are fitted together. Adjacent load-bearing rings are slidably connected in the vertical direction. The innermost load-bearing ring and the stool panel are connected by snap fit, and the outermost load-bearing ring and the base are connected by snap fit. However, the above folding stool has the following technical defects.

[0004] After the stool is unfolded, people can sit and rest above the stool panel, but since it does not provide a backrest function, during a long sitting process, the muscles are always in a tense state, increasing the load on the lumbar spine of the human body, and easily causing low back pain, muscle damage, and myofascitis, and more likely to generate a sense of fatigue. The connection stability between adjacent load-bearing rings is an important indicator for testing the load-bearing capacity. The conventional folding stool is provided with a plurality of sliding snap fits in the circumferential direction of the load-bearing ring, but the design of the snap fit is not dense, and the load-bearing capacity is general. The stool panel generally uses a straight panel or has a cushion, but when sitting for a long time, the comfort of the buttocks becomes low. In the folding process, it is necessary to push down multiple load-bearing rings simultaneously, which is time-consuming.

Summary of the Invention

Problems to be Solved by the Invention

[0005] In order to solve the above problems, the present invention provides a folding telescopic tool with a backrest.

Means for Solving the Problems

[0006] The following technical means are used in the present invention. The folding telescopic tool with a backrest includes a base, a lifting assembly mounted above the base and including a plurality of load-bearing rings assembled by being nested in order from the outside to the inside, wherein a lifting lock structure is provided between adjacent load-bearing rings, and a stool panel mounted above the lifting assembly, a backrest rotatably mounted at the rear end of the stool panel and having a storage state in which it abuts above the stool panel and a use state in which it rotates upward and separates from the stool panel. In the use state, a positioning structure for engaging and fixing the position of the backrest is provided between the backrest and the stool panel, and the lifting lock structure has a lock position and an unlock position switched by co-directional rotation along the circumferential direction of all the load-bearing rings. In the use state, adjacent load-bearing rings are pulled apart to the farthest ends from each other, the lifting lock mechanism is in the lock position, and the relative positions of all the load-bearing rings are fixed. In the storage state, the lifting lock structure is switched to the unlock position, all the load-bearing rings descend to the height of the lowermost load-bearing ring, and the stool panel and the base are engaged to cover the lifting assembly.

[0007] The following are several selectable modes, which are provided further but not used as additional limitations to the above overall means, and are merely additional complementary or preferred modes. On the premise that there is no technical or logical contradiction, each selectable mode may be combined alone or in combination with the above overall means, or may be combined among multiple selectable modes.

[0008] Preferably, at least one rotation position is provided at the rear end of the tool panel, and at least one rotating member rotatably attached in engagement with the rotation position is provided at one end of the backrest.

[0009] Preferably, the positioning structure is at least one stopper bar and at least one locking bar fixed to the rear end of the upper end surface of the tool panel. The stopper bar is located in front of the locking bar, and the height of the stopper bar is greater than the height of the locking bar. An extending piece is provided at one end of the backrest close to the rotating member. In the use state, the lower end of the extending piece is locked between the stopper bar and the locking bar.

[0010] Preferably, the rotation position includes a plurality of relay connection pieces erected and fixed above the rear end of the tool panel. The rotating member is provided with a plurality of partition plates arranged at intervals and a plurality of notches for inserting the relay connection pieces. The relay connection pieces are arranged between adjacent partition plates. A shaft is inserted into the rotating member. The shaft penetrates all the partition plates and all the relay connection pieces at the same time. In the use state, the rear end of the relay connection piece abuts against the inner wall at the rear side of the rotating member and forms the positioning structure together with the stopper bar and the locking bar.

[0011] Preferably, at least one positioning block is provided on the upper end surface of the tool panel, and at least one positioning groove is provided on the front end surface of the backrest. In the storage state, the positioning block is locked in matching with the positioning groove.

[0012] Preferably, the upper end surface of the stool panel extends in a wavy shape and has one peak and two valleys. The two valleys are respectively located on the left and right sides of the peak, and the height of the peak is greater than the height of the valleys.

[0013] Preferably, at least one empty space recessed downward is provided on the upper end surface of the stool panel, and a through hole is provided in the backrest. In the storage state, the through hole corresponds to the position of at least one empty space and engages to form a gripping position that can be grasped by a person's hand.

[0014] Preferably, the load-bearing ring includes a lower connection load-bearing ring fixed to the base, an upper connection load-bearing ring fixed to the stool panel, and a plurality of intermediate load-bearing rings arranged between the upper connection load-bearing ring and the lower connection load-bearing ring. The lifting and locking structure includes a plurality of connecting groove groups arranged at intervals along the circumferential direction of the intermediate load-bearing ring or the lower connection load-bearing ring, and a plurality of sliders fixed to the lower ends of the intermediate load-bearing ring or the upper connection load-bearing ring. Each single connecting groove group includes a plurality of connecting groove openings arranged at intervals from each other. The connecting groove opening includes a positioning portion and a guiding portion. The positioning portion is provided on the upper end side of the guiding portion and forms a bending structure. The guiding portion extends along the vertical direction. The slider is slidably connected to the connecting groove opening. In the use state, the slider is arranged in the positioning portion and forms a locking position. In the storage state, the slider disengages from the positioning portion and translates parallel to the lowermost end of the guiding portion.

[0015] Preferably, a plurality of recesses recessed downward at intervals along their circumferential directions are provided on the upper end surfaces of the intermediate load-bearing ring and the lower connection load-bearing ring, respectively. A notch is provided at the bottom end of the recess. A plurality of load-bearing wedges are provided on the lower end of the outer wall of the intermediate load-bearing ring and the lower end of the outer wall of the upper connection load-bearing ring, respectively. In the use state, among two adjacent load-bearing rings, the load-bearing wedge on the upper load-bearing ring abuts above the bottom end of the recess of the lower load-bearing ring. In the process of switching from the use state to the storage state, the load-bearing wedge located on the upper load-bearing ring enters from above the bottom end of the recess of the lower load-bearing ring, passes through the notch, and enters below the notch.

[0016] More preferably, the upper connection load-bearing ring is fixed below the stool panel by the locking of a plurality of locking blocks and locking ports. The lower connection load-bearing ring is fixed above the base by the locking of a plurality of locking blocks and locking ports. At least one tension spring arranged along the vertical direction is provided between the base and the stool panel. A handle ring is provided on the stool panel or the base.

Advantages of the Invention

[0017] Compared with the prior art, the present invention has the following beneficial effects.

[0018] By rotatably attaching the backrest to the rear end of the stool panel, in the use state, it is necessary to invert the backrest upward until it forms a certain angle with the stool panel, and further, it can provide support for the user's back. On the premise of not affecting the folding and storage function, the user's sitting experience is better. A plurality of connecting groove groups are provided in both the lower connecting load receiving ring and each intermediate load receiving ring, and three connecting groove openings for slidably mounting a slider are provided in each connecting groove group. In the use state, the slider is locked to the positioning portion of the connecting groove opening. By designing the connecting groove group, the local load receiving capacity can be greatly improved, and further the load receiving capacity of the entire stool body can be improved. By providing load receiving wedges at the lower end of the outer wall of the upper connecting load receiving ring and the lower end of the outer wall of the intermediate load receiving ring, in the use state, the load receiving wedge located on the upper load receiving ring abuts against the upper end of the lower load receiving ring, and the load receiving capacity of the stool body can be further improved. The upper end of the stool panel is designed with a wavy structure, which conforms to ergonomics and makes the user sit more comfortably. By providing a plurality of tension springs between the base and the stool panel, it can assist the user to more easily complete the folding and storage of all the load receiving rings. By designing the outer contour of the base to be square, in the use state, the overall layout stability can be improved, and it is less likely to fall down due to lateral forces.

Brief Description of the Drawings

[0019] To more clearly explain the technical means in the embodiments of the present invention or the prior art, the following briefly describes the drawings necessary for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on the structures shown in these drawings without creative labor.

[0020]

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[0021] With reference to the drawings, the realization of the object, functional features, and advantages of the present invention will be further described in combination with embodiments.

Embodiments for Carrying Out the Invention

[0022] Hereinafter, with reference to the drawings in the embodiments of the present invention, the technical means in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative labor shall fall within the protection scope of the present invention.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only for explaining the relative positional relationship and movement status between each member in a specific posture (as shown in the drawings). When the specific posture changes, the directional indications also change accordingly.

[0024] In addition, the descriptions related to "first", "second", etc. in the present invention are only for the purpose of explanation, and should not be understood as indicating or suggesting their relative importance, or implying the quantity of the indicated technical features. Thus, the features limited by "first" and "second" may explicitly or implicitly include at least one of the features. Also, the technical means between each embodiment may be combined with each other, but it must be based on what can be realized by those skilled in the art. If the combination of technical means conflicts with each other or cannot be realized, such a combination of technical means does not exist and should be considered not to be within the protection scope required by the present invention.

[0025] As shown in the specific embodiment diagrams 1 to 20, the folding telescopic stool with a backrest according to the present invention includes a base 1, A lifting assembly including a plurality of load-bearing rings mounted above the base 1 and assembled by being nested from the outside to the inside in sequence, wherein a lifting lock structure is provided between adjacent load-bearing rings. A stool panel 5 mounted above the lifting assembly. A backrest 6 rotatably mounted at the rear end of the stool panel 5 and having a storage state in which it abuts above the stool panel 5 and a use state in which it rotates upward and away from the stool panel 5. In the use state, a positioning structure for engaging and fixing the position of the backrest 6 is provided between the backrest 6 and the stool panel 5. The lifting lock structure has a lock position and an unlock position switched by co-directional rotation along the circumferential direction of all the load-bearing rings. In the use state, adjacent load-bearing rings are pulled apart to the farthest ends from each other, the lifting lock mechanism is located at the lock position, and the relative positions of all the load-bearing rings are fixed. In the storage state, the lifting lock structure is switched to the unlock position, all the load-bearing rings are lowered to the height of the lowermost load-bearing ring, and the stool panel 5 and the base 1 are engaged to cover the lifting assembly.

[0026] For ease of understanding and the following description, in this embodiment, the base 1, the lifting assembly, and the stool panel 5 are collectively referred to as the stool body, which corresponds to the backrest 6 being rotatably mounted on the upper rear side of the stool body.

[0027] As a preferred embodiment of this embodiment, at least one rotation position is provided at the rear end of the stool panel 5, and at least one rotating member 61 rotatably mounted by engaging with the rotation position is provided at one end of the backrest 6.

[0028] Next, as shown in FIGS. 6 and 7, in this embodiment, the rotation position includes a plurality of relay connection pieces 51 erected and fixed above the rear end of the stool panel 5. The rotating member 61 is provided with a plurality of partition plates 611 arranged at intervals from each other and a plurality of notches 612 for inserting the relay connection pieces 51. The relay connection pieces 51 are arranged between adjacent partition plates 611. A shaft 613 is inserted into the rotating member 61. The shaft 613 penetrates through all the partition plates 611 and all the relay connection pieces 51 at the same time. In the use state, the rear end of the relay connection piece 51 abuts against the inner wall on the rear side of the rotating member 61 and forms a positioning structure together with the stopper bar 56 and the locking bar 57.

[0029] As can be seen from FIGS. 1, 2 and 4, in this embodiment, there are two rotation positions, which are respectively provided on the left and right sides of the rear end of the stool panel 5. Hereinafter, the assembly method of the rotating member 61 and the rotation position will be described.

[0030] When it is necessary to attach the rotating member 61 to the corresponding rotation position, it is necessary to insert all the relay connection pieces 51 into the gaps between the adjacent partition plates 611 through the notches 612. Through holes are provided in both the relay connection pieces 51 and the partition plates 611. By simply passing the shaft 613 through all the through holes of the relay connection pieces 51 and the partition plates 611, the rotating member 61 can be attached to the rotation position. In addition, by providing the notches 612, the relative rotation between the relay connection pieces 51 and the rotating member 61 can be smoothly completed.

[0031] As can be seen from FIGS. 2 to 4, 6 and 7, in this embodiment, the positioning structure is at least one stopper bar 56 and at least one locking bar 57 fixed to the rear end of the upper end surface of the stool panel 5. The stopper bar 56 is located in front of the locking bar 57, and the height of the stopper bar 56 is greater than the height of the locking bar 57. An extension piece 63 is provided at one end of the backrest 6 close to the rotating member 61. In the use state, the lower end of the extension piece 63 is locked between the stopper bar 56 and the locking bar 57.

[0032] In this embodiment, two stopper bars 56 and two locking bars 57 are provided. When it is necessary to switch the backrest 6 from the stored state to the use state, the user manually reverses the backrest 6 upward. In the process of the backrest 6 reversing upward, the extending piece 63 passes through the locking bar 57. Since the height of the locking bar 57 is low and the extending piece 63 is made of plastic material, after the extending piece 63 is slightly deformed, it gets over the locking bar 57 and abuts against the rear end of the stopper bar 56. By providing the stopper bar 56, it is possible to prevent the backrest 6 from continuously reversing backward. By providing the locking bar 57, the user can reverse the backrest 6 upward again with a little force applied to switch it to the stored state.

[0033] Also, in the use state, the relay connecting piece 51 abuts against the rear inner wall of the rotating member 61 and further engages with the stopper bar 56 to fix the rotation position of the backrest 6. In this case, since the backrest 6 has a large pressure resistance capacity, the user can use it safely.

[0034] Next, as can be seen from FIG. 1, in this embodiment, one positioning block 52 is provided on each of the left and right sides of the rearward position of the upper end surface of the stool panel 5, and one positioning groove 62 is provided on each of the left and right sides of the lower position of the front end surface of the backrest 6. In the stored state, the positioning block 52 is engaged with the positioning groove 62 in a matching manner.

[0035] By providing the positioning block 52 and the positioning groove 62, in the stored state, the fixation between the backrest 6 and the stool panel 5 can be completed, and the backrest 6 can be detached from the stool panel 5 only when a certain external force acts. In this way, when taking out the folding telescopic stool in this embodiment by the handle ring 7 (described later) in the stored state, there is no worry that the backrest 6 will suddenly open from the stool panel 5.

[0036] Next, as can be seen from FIGS. 6 and 8, in this embodiment, the upper end surface of the stool panel 5 extends in a wavy shape and has one peak and two valleys. The two valleys are located on the left and right sides of the peak respectively, and the height of the peak is greater than the height of the valleys.

[0037] Designing the upper end surface of the stool panel 5 into a wavy structure with one peak and two valleys is more ergonomic and improves the comfort of the user's cushion.

[0038] As can be seen from FIG. 6, in this embodiment, two empty spaces recessed downward are provided on the upper end surface of the stool panel 5, and a through hole 64 is provided in the backrest 6. In the storage state, the through hole 64 corresponds to the positions of the two empty spaces and engages with each other to form a gripping position that can be grasped by a person's hand.

[0039] Hereinafter, the formation method of the empty space on the upper end surface of the stool panel 5 will be described.

[0040] In this embodiment, a second concave groove 54 is provided in the stool panel 5, and an upper connection pad 55 is detachably attached to match the second concave groove 54. A plurality of fourth locking ports 541 spaced apart from each other are provided on the inner edge of the groove of the second concave groove 54, and a plurality of fourth locking blocks 551 are provided on the outer edge of the upper connection pad 55. By locking the fourth locking block 551 and the fourth locking port 541, the assembly of the upper connection pad 55 can be completed. A third concave member 542 and a fourth concave member are provided in the second concave groove 54, and a third engaging annular opening 552 and a fourth engaging annular opening 553 are provided in the upper connection pad 55. The third engaging annular opening 552 matches and abuts against the upper end of the third concave member 542 to form one empty space, and the fourth engaging annular opening 553 matches and abuts against the upper end of the fourth concave member 543 to form another empty space. By designing in this way, the processing and assembly of the stool panel 5 are facilitated. In the storage state, after the user's hand passes through the through hole 64, it can enter the empty space and further abut against the front end surface of the backrest 6. At this time, it can receive force.

[0041] In addition, since the upper connection pad 55 is provided at the center position of the upper end surface of the stool panel 5, by providing two empty spaces, it is possible to further improve the comfort to a certain extent without affecting the normal sitting posture of the user.

[0042] Next, as can be seen from FIGS. 8 and 9, in this embodiment, a joint plate 65 is detachably attached to the rear side of the backrest 6, an opening 651 corresponding to the through hole 64 is provided in the joint plate 65, and a plurality of ribs 66 are provided inside the backrest 6. By designing in this way, while not affecting the structural stability of the backrest 6, it is possible to facilitate the injection molding process of the backrest 6 and reduce the cost of the injection molding material.

[0043] As can be seen from FIGS. 14 to 19, in this embodiment, the load-bearing ring includes a lower connection load-bearing ring 2 fixed to the base 1, an upper connection load-bearing ring 4 fixed to the stool panel 5, and a plurality of intermediate load-bearing rings 3 arranged between the upper connection load-bearing ring 4 and the lower connection load-bearing ring 2. The lifting lock structure includes a plurality of connecting groove groups arranged at intervals along the circumferential direction of the intermediate load-bearing ring 3 or the lower connection load-bearing ring 2, and a plurality of sliders fixed to the lower ends of the intermediate load-bearing ring 3 or the upper connection load-bearing ring 4. Each single connecting groove group includes a plurality of connecting groove openings arranged at intervals from each other. The connecting groove openings include a positioning portion 311 and a guide portion 312. The positioning portion 311 is provided on the upper end side of the guide portion 312 and forms a bent structure. The guide portion 312 extends along the vertical direction. The slider is slidably connected to the connecting groove opening. In the use state, the slider is arranged in the positioning portion 311 and forms a locking position. In the storage state, the slider detaches from the positioning portion 311 and translates parallel to the lowermost end of the guide portion 312.

[0044] Regarding the operating principle of the lifting assembly, in the usage state, the slider is disposed in the positioning portion 311, the positioning portion 311 is a groove opening recessed downward, and a slope is provided at the lower end of the positioning portion 311. After the slider is disposed in the positioning portion 311, if the load receiving ring is directly rotated, the slider cannot be disengaged from the positioning portion 311. When it is necessary to switch to the storage state, the load receiving ring needs to be pulled up to a certain height to disengage the slider from the positioning portion 311, and then the load receiving ring can be rotated to move the slider to the upper end of the guide portion 312 (since the upper connecting load receiving ring 4 is fixed to the stool panel 5, by pulling up the stool panel 5, all the load receiving rings can be translated upward in parallel, and by continuously rotating the stool panel 5, all the load receiving rings can be rotated from top to bottom in sequence). After the slider moves to the upper end of the guide portion 312, since the guide portion 312 extends along the vertical direction, at this time, by pressing down the load receiving ring, among the two adjacent load receiving rings, the slider of the upper load receiving ring can be slid along the guide portion 312 of the lower load receiving ring to the lower end of the guide portion 312, and at this time, the upper load receiving ring and the lower load receiving ring are located at the same height.

[0045] Next, in order to increase the structural stability of the lifting assembly, in this embodiment, the inner diameters of all the load receiving rings gradually increase from top to bottom, that is, the inner diameter of the upper connecting load receiving ring 4 is the smallest, and the inner diameter of the lower connecting load receiving ring 2 is the largest. Among all the adjacent load receiving rings, after the upper load receiving ring descends to the same height as the lower load receiving ring, as can be seen from FIG. 14, at this time, the upper connecting load receiving ring 4 and all the intermediate load receiving rings 3 all descend to the height where the lower connecting load receiving ring 2 is located, that is, all the load receiving rings are at the same height and are fitted and connected to each other. At this time, as shown in FIGS. 3 to 5, by locking and fixing the stool panel 5 and the base 1 to each other (described later), the lifting assembly can be stored between the stool panel 5 and the base 1, and the occupied space is small.

[0046] For ease of understanding, as shown in FIGS. 15 to 19, in this embodiment, the slider located on the intermediate load receiving ring 3 is the first slider 32, the slider located on the upper connecting load receiving ring 4 is the second slider 43, the connecting groove opening located on the lower connecting load receiving ring 2 is the first connecting groove opening 21, and the connecting groove opening located on the intermediate load receiving ring 3 is the second connecting groove opening 31.

[0047] Regarding the connection between the upper connecting load receiving ring 4 and the intermediate load receiving ring 3, there are a plurality of second sliders 43, which are fixed to the lower end of the upper connecting load receiving ring 4 at intervals along the circumferential direction of the upper connecting load receiving ring 4. The second slider 43 includes an integrally formed second internal connection block 431 and a second external connection block 432. The second connecting groove opening 31 includes an internal connection groove opening 313 and an external connection groove opening 314 that communicate with each other. The external connection groove opening 314 is located outside the internal connection groove opening 313. The second internal connection block 431 is slidably connected to the internal connection groove opening 313, and the second external connection block 432 is slidably connected to the external connection groove opening 314.

[0048] Regarding the connection between adjacent intermediate load receiving rings 3, there are a plurality of first sliders 32, which are fixed to the lower end of the intermediate load receiving ring 3 at intervals along the circumferential direction of the intermediate load receiving ring 3. The first slider 32 includes an integrally formed first internal connection block 321 and a first external connection block 322. The first internal connection block 321 is slidably connected into the internal connection groove opening 313, and the first external connection block 322 is slidably connected into the external connection groove opening 314.

[0049] Regarding the connection between the intermediate load receiving ring 3 and the lower connecting load receiving ring 2, the structure of the first connecting groove opening 21 is the same as that of the second connecting groove opening 31. The first slider 32 is slidably connected in matching with the first connecting groove opening 21, and the description here is omitted.

[0050] In the connection structure of the adjacent load-bearing rings, by providing the internal connection groove opening 313 and the external connection groove opening 314, the slidable attachment between the second slider 43 and the second connection groove opening 31, the slidable attachment between the first slider 32 and the second connection groove opening 31, and the slidable attachment between the first slider 32 and the first connection groove opening 21 can all be made very stable.

[0051] In addition, in the process of switching to the storage state, regarding the rotation of all the load-bearing rings, after the second slider 43 of the upper connection load-bearing ring 4 translates parallel to the upper end of the guide portion 312 of the intermediate load-bearing ring 3, the upper connection load-bearing ring 4 is continuously rotated (realized by rotating the stool panel 5), the intermediate load-bearing ring 3 is driven to rotate, and the first slider 32 of the upper intermediate load-bearing ring 3 can be translated parallel to the upper end of the guide portion 312 of the lower intermediate load-bearing ring 3. Similarly, by continuously rotating the stool panel 5, all the sliders can be translated parallel to the upper end of the guide portion 312.

[0052] And in this embodiment, on the upper end surfaces of the intermediate load-bearing ring 3 and the lower connection load-bearing ring 2, a plurality of recesses are provided at intervals along their circumferential directions and recessed downward, and notches are provided at the bottom ends of the recesses. A plurality of load-bearing wedges are provided on the lower ends of the outer walls of the intermediate load-bearing ring 3 and the upper connection load-bearing ring 4. In the use state, among two adjacent load-bearing rings, the load-bearing wedge located on the upper load-bearing ring abuts above the bottom end of the recess located on the lower load-bearing ring. In the process of switching from the use state to the storage state, the load-bearing wedge located on the upper load-bearing ring enters below the notch through the notch from above the bottom end of the recess of the lower load-bearing ring.

[0053] For ease of understanding, as can be seen from FIGS. 15 to 19, in this embodiment, the load-receiving wedge located on the intermediate load-receiving ring 3 is the first load-receiving wedge 33, the load-receiving wedge located on the upper connecting load-receiving ring 4 is the second load-receiving wedge 44, the recess located on the lower connecting load-receiving ring 2 is the first recess 23, the notch located in the first recess 23 is the first notch 231, the recess located on the intermediate load-receiving ring 3 is the second recess 34, and the notch located in the second recess 34 is the second notch 341. In the use state, the first load-receiving wedge 33 abuts above the bottom end of the first recess 23, and the second load-receiving wedge 44 abuts above the bottom end of the second recess 34, so that the load-receiving capacity of the lifting assembly can be effectively improved. When it is necessary to switch to the storage state, by rotating all the load-receiving rings, the first load-receiving wedge 33 is moved directly above the first notch 231, and the second load-receiving wedge 44 is moved directly above the second notch 341. Then, the stool panel 5 is pushed down, the first load-receiving wedge 33 enters below through the first notch 231, and the second load-receiving wedge 44 enters below through the second notch 341.

[0054] More specifically, the upper connecting load-receiving ring 4 is fixed below the stool panel 5 by the locking of a plurality of locking blocks and locking ports, the lower connecting load-receiving ring 2 is fixed above the base 1 by the locking of a plurality of locking blocks and locking ports, at least one tension spring 8 arranged along the vertical direction is provided between the base 1 and the stool panel 5, and a handle ring 7 is provided on the stool panel 5 or the base 1.

[0055] Regarding the locking between the lower connection load-receiving ring 2 and the base 1, as can be seen from FIGS. 11, 16, and 20, in this embodiment, the base 1 is provided with a sleeve connection groove 11 for the lower connection load-receiving ring 2 to lock and enter. A plurality of first locking openings 12 spaced apart from each other are provided at the groove bottom edge of the sleeve connection groove 11. A plurality of second locking blocks 22 spaced apart from each other are provided at the lower end edge of the lower connection load-receiving ring 2. By locking the second locking block 22 and the first locking opening 12, it is possible to fix the lower connection load-receiving ring 2 to the base 1.

[0056] Also, in this embodiment, a plurality of seal plates 15 are detachably attached to the upper end surface of the base 1. By providing the seal plates 15, the sleeve connection groove 11 is formed by engagement.

[0057] Regarding the locking between the stool panel 5 and the upper connection load-receiving ring 4, as can be seen from FIGS. 10 and 15, in this embodiment, a connection ring 53 is provided at the lower end of the stool panel 5. A plurality of third locking openings 531 spaced apart from each other along its circumferential direction are provided in the connection ring 53. A plurality of abutting blocks 532 spaced apart from each other are further provided on the outer wall of the connection ring 53. A plurality of flanges 41 spaced apart from each other are provided at the upper end of the upper connection load-receiving ring 4. A third locking block 42 is fixed inside the flange 41. By locking the third locking block 42 and the third locking opening 531, it is possible to fix the upper connection load-receiving ring 4 to the stool panel 5. At this time, the upper end of the upper connection load-receiving ring 4 abuts against the abutting block 532.

[0058] Also, as can be seen from FIGS. 5, 12, and 13, in this embodiment, a boss 13 is provided at the groove bottom of the sleeve connection groove 11 of the base 1, and a plurality of second locking openings 131 spaced apart from each other are provided at the edge of the boss 13. A first concave groove 133 corresponding to the boss 13 is provided at the lower end of the base 1. A first concave member 134 and a second concave member 135 are provided at the groove bottom of the first concave groove 133. A first pad is attached to the groove opening of the first concave groove 133. At the edge of the first pad, a plurality of first locking blocks 141 that engage and lock corresponding to the second locking openings 131 are provided. A first engaging annular opening 143 and a second engaging annular opening 144 are provided in the first pad. By the first engaging annular opening 143 matching and abutting against the lower end of the first concave member 134, one empty space is formed. By the second engaging annular opening 144 matching and abutting against the lower end of the second concave member 135, another empty space is formed.

[0059] In this embodiment, two first fasteners 142 are provided at the upper end of the first pad, and two retraction openings 132 are provided at the groove bottom of the first concave groove 133. After passing through the retraction openings 132, the first fasteners 142 extend above the retraction openings 132. Two second fasteners 58 are provided at the lower end of the stool panel 5. In the stored state, by the fastening and locking of the first fasteners 142 and the second fasteners 58 (in the process of pushing down the stool panel 5, the slight deformation of the first fasteners 142 and the second fasteners 58 can realize the fastening and locking with each other), the stool panel 5 and the base 1 can be connected to each other, and further, the stool panel 5 can be prevented from detaching from the base 1. When it is necessary to switch to the use state, since the stool panel 5 needs to be rotated, at this time, the positions of the first fasteners 142 and the second fasteners 58 are displaced, and then the stool panel 5 can be pulled away without being affected.

[0060] As shown in FIGS. 3 and 4, in this embodiment, a handle ring 7 is provided at the rear end of the stool panel 5. In the stored state, the user can pull up the folding telescopic stool by the handle ring 7, making it easy to take out.

[0061] Also, as shown in FIG. 20, in this embodiment, a plurality of fixing blocks 16 for engaging and attaching the tension spring 8 are provided at the bottom of the sleeve connection groove 11 of the base 1 and at the bottom of the stool panel 5. The tension spring 8 is arranged along the vertical direction, and by the plurality of tension springs 8 engaging together, it can assist the user to more easily complete the folding and storage of all the load-bearing rings.

[0062] In a conventional folding stool, the outer contour of the base 1 is mainly a circular contour. In the actual use process, due to such a structural design, when the stool body comes into lateral contact and receives force, the stool is prone to falling and has low placement stability. Therefore, in this embodiment, by designing the outer contour of the base 1 to be square in all cases (in the storage state, in order to facilitate the connection between the base 1 and the stool panel 5, in this embodiment, the outer contour of the stool panel 5 is also designed to be square), the placement stability of the entire stool can be improved, and it is less likely to fall due to lateral force.

[0063] The folding telescopic stool with a backrest of the present invention as described above is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Under the inventive concept of the present invention, equivalent structural conversions made using the content of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are all included in the patent protection scope of the present invention.

Explanation of Reference Numerals

[0064] 1 Base 11 Sleeve Connection Groove 12 First Locking Port 13 Boss 131 Second Locking Port 132 Retreating Port 133 First Concave Groove 134 First Concave Member 135 Second Concave Member 14 Lower Connection Pad 141 First Locking Block 142 First Fastener 143 First engaging annular opening 144 Second engaging annular opening 15 Sealing plate 16 Fixed block 2 Lower connecting load receiving ring 21 First connecting groove opening 22 Second locking block 23 First concave part 231 First notch 3 Intermediate load receiving ring 31 Second connecting groove opening 311 Positioning part 312 Guide part 313 Internal connecting groove opening 314 External connecting groove opening 32 First slider 321 First internal connecting block 322 First external connecting block 33 First load receiving wedge 34 Second concave part 341 Second notch 4 Upper connecting load receiving ring 41 Flange 42 Third locking block 43 Second slider 431 Second internal connecting block 432 Second external connecting block 44 Second load receiving wedge 5 Stool panel 51 Relay connecting piece 52 Positioning block 53 Connecting ring 531 Third locking opening 532 Contacting block 54 Second concave groove 541 Fourth locking opening 542 Third concave member 543 Fourth concave member 55 Upper connecting pad 551 Fourth locking block 552 Third engaging annular opening 553 Fourth engaging annular opening 56 Stopper bar 57 Lock bar 58 Second fastener 6 Backrest 61 Rotating member 611 Partition plate 612 Notch 613 Shaft 62 Positioning groove 63 Extension piece 64 Through hole 65 Joint plate 651 Opening 66 Rib 7 Handle ring 8 Tension spring

Claims

1. With the base, a lifting assembly mounted above the base, including a plurality of load-bearing rings assembled in a fitted manner from outside to inside, and a lifting lock structure is provided between adjacent load-bearing rings; a stool panel mounted above the lift assembly; a backrest rotatably attached to a rear end of the stool panel, and having a storage state in which it abuts against an upper portion of the stool panel and a use state in which it rotates upward and is separated from the stool panel, wherein a positioning structure is provided between the backrest and the stool panel in the use state, for fixing the position of the backrest; The lift lock structure has a locked position and an unlocked position switched by rotating all of the load-bearing rings in the same direction along the circumferential direction, and in a use state, adjacent load-bearing rings are pulled away from each other to their farthest ends, and the lift lock mechanism is in a locked position and fixes the relative positions of all of the load-bearing rings, and in a storage state, the lift lock structure is switched to an unlocked position, and all of the load-bearing rings are lowered to the height of the lowest load-bearing ring, and the stool panel and the base engage to cover the lift assembly.

2. The folding telescopic stool with backrest according to claim 1, characterized in that at least one rotation position is set at the rear end of the stool panel, and at least one rotating member is provided at one end of the backrest, which is rotatably attached to the rotation position.

3. The folding telescopic stool with backrest according to claim 2, characterized in that the positioning structure is at least one stopper bar and at least one locking bar fixed to the rear end of the upper end surface of the stool panel, the stopper bar is located in front of the locking bar, and the height of the stopper bar is greater than the height of the locking bar, and an extension piece is provided at one end of the backrest close to the rotating member, and in a state of use, the lower end of the extension piece is locked between the stopper bar and the locking bar.

4. The folding telescopic stool with backrest according to claim 3, characterized in that the rotation position includes a plurality of intermediate connection pieces fixed upright above the rear end of the stool panel, the rotating member is provided with a plurality of partition plates arranged at intervals from each other and a plurality of notches for inserting the intermediate connection pieces, the intermediate connection pieces are arranged between adjacent partition plates, a shaft is inserted into the rotating member, the shaft penetrates all of the partition plates and all of the intermediate connection pieces simultaneously, and in a state of use, the rear end of the intermediate connection piece abuts against the rear inner wall of the rotating member, and forms the positioning structure together with a stopper bar and a locking bar.

5. The folding telescopic stool with backrest according to claim 4, characterized in that at least one positioning block is provided on the upper end surface of the stool panel, at least one positioning groove is formed on the front end surface of the backrest, and in the stored state, the positioning block is fitted into and locked into the positioning groove.

6. The folding telescopic stool with backrest according to any one of claims 1 to 5, characterized in that the upper end surface of the stool panel extends in a wavy manner and has one peak and two valleys, the two valleys are located on the left and right sides of the peak respectively, and the height of the peak is greater than the height of the valley.

7. The folding telescopic stool with backrest according to claim 6, characterized in that the upper end surface of the stool panel is provided with at least one empty space recessed downward, and the backrest is provided with a through hole, and in the stored state, the through hole corresponds to the position of the at least one empty space and forms a gripping position for grasping with a human hand in combination with the empty space.

8. The load-receiving ring includes a lower connection load-receiving ring fixed to the base, an upper connection load-receiving ring fixed to the stool panel, and a plurality of intermediate load-receiving rings arranged between the upper connection load-receiving ring and the lower connection load-receiving ring, and the lifting lock structure includes a plurality of connecting groove groups arranged at intervals along the circumferential direction of the intermediate load-receiving ring or the lower connection load-receiving ring, and a plurality of sliders fixed to the lower end of the intermediate load-receiving ring or the upper connection load-receiving ring, and each of the single connecting groove groups is arranged at intervals from each other.

8. The foldable telescopic stool with backrest according to claim 1, further comprising: a plurality of connecting grooves formed by connecting the connecting grooves with a positioning portion and a guide portion, the positioning portion is provided on an upper end side of the guide portion and forms a folding structure, the guide portion extends along a vertical direction, the slider is slidably connected to the connecting grooves, in a use state, the slider is disposed in the positioning portion and forms a locking position, and in a storage state, the slider is released from the positioning portion and moves in parallel to the bottom end of the guide portion.

9. 9. The foldable telescopic stool with backrest according to claim 8, wherein the upper end surface of the intermediate load-receiving ring and the upper end surface of the lower connecting load-receiving ring are each provided with a plurality of recesses recessed downward at intervals along their circumferential direction, a notch is provided at the bottom end of the recesses, and a plurality of load-receiving wedges are each provided at the lower end of the outer wall of the intermediate load-receiving ring and the lower end of the outer wall of the upper connecting load-receiving ring, wherein in a use state, the load-receiving wedge located in the upper load-receiving ring of the two adjacent load-receiving rings abuts against an upper end of the bottom end of the recess located in the lower load-receiving ring, and in a process of switching from a use state to a storage state, the load-receiving wedge located in the upper load-receiving ring enters below the notch through the notch from above the bottom end of the recess of the lower load-receiving ring.

10. The folding telescopic stool with backrest according to claim 9, characterized in that the upper connection load-bearing ring is fixed below the stool panel by engaging with a plurality of locking blocks and locking holes, the lower connection load-bearing ring is fixed above the base by engaging with a plurality of locking blocks and locking holes, at least one tension spring is provided between the base and the stool panel along the vertical direction, and a handle ring is provided on the stool panel or the base.

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